To address a superior with no regard for status or respect. From the Bill Murray character (groundskeeper Carl Spackler) in the 1980 movie "Caddyshack".

So we finish the eighteenth and the (Dalai Lama)'s gonna stiff me. And I say, "Hey, Lama, hey, how about a little something, you know, for the effort, you know." And he says, "Oh, uh, there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice.